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Finding the Fourth Proportional to 1,309.53, 1,803.20 and 1,132.16

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Solution

The fourth proportional to 1,309.53, 1,803.20 and 1,132.16 is: 1,558.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.53 : 1,803.20 = 1,132.16 : x
  2. Step 2: Convert to fraction form
    1,309.53/1,803.20 = 1,132.16/x
  3. Step 3: Cross multiply
    1,309.53x = 1,803.20 × 1,132.16
  4. Step 4: Simplify right side
    1,309.53x = 2,041,496.24
  5. Step 5: Solve for x
    x = 2,041,496.24/1,309.53
  6. Step 6: Final answer
    x = 1,558.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.